Kia ora!
I've also had people wondering what the story is with kayaking round Picton. Doing this trip hinges on having people with some kayaking experience coming along or else we'd have to go for a guided option (which is really expensive and touristy). The trip would take place on the second week of the holidays (exact days are flexible on who wants to actually go along of course) and should be pretty awesome, but yeah is pretty dependent on getting some experienced people.
If you're keen drop me an email (beattianna@student.vuw.ac.nz) and I'll keep you posted on further developments